When the Rebels disabled an Imperial transport carrying officers headed for the Death Star, the Immortal attempted to prevent the shuttle Hunter from capturing the transport. However, by the time it arrived the transport had already been captured and was headed for the EF76 Nebulon-B escort frigateInad. While fighters launched from the Immortalengaged Rebel Y-wings, more Imperial transports attempted to recapture the stolen transport. However, Farlander again destroyed the transports and the Rebels escaped.

During another mission it approachedDefiance above Bestine IV and launched squadrons of TIE/sa bombers to destroy it. Most of the Defiance's pilots were away flying other missions but the ship was able to scramble three X-wings and two R-22 Spearheads in its defense. The Rebel pilots, including Farlander and Breth Gart, on temporary assignment from the Independence, were able to tarry them, until the Defiance hyperspaced away. Same happened with Independence as soon as the Death Star was completed.

The officers who had been previously captured by the Rebels were unable to reveal much information except that Bevel Lemelisk was leading the design team and that some of his team had recently traveled to Coruscant for a meeting with Grand MoffWilhuff Tarkin. As the technicians left Coruscant on the CR90 corvetteGodar bound for the Intrepid, the Rebels attacked with a Y-wing from Red Squadron, flown by Farlander, two X-wings from Blue Squadron and the Lambda-class shuttleRescue 1. The Immortal launched TIEs to assist the escorting Assault Gunboats, but the Rebel fighters were able to hold off the Imperials while Farlander disabled the Godar and Rescue 1 conducted the boarding operation. After Rescue 1 captured the personnel and fled into hyperspace, Farlander destroyed the Godar before following the other Rebels.

Later the Immortalattacked the Mon Calamari Star CruiserIndependence in the Bestine system as part of a major Imperial offensive after the completion of the Death Star. The Imperial attack consisted of TIE Bombers to attack the cruiser while Assault Gunboats and TIE/IN interceptors engaged the defending X-wings and R-22s. Despite splitting up and attacking from three different directions two of the Imperial bomber groups were quickly destroyed. The third made it through and began firing proton torpedoes at the Independence. The defending starfighters were caught up fighting the Gunboats but eventually broke away and were able to help the Independence's gunners destroy the last bombers. The Independence escaped to hyperspace with its shields down but with only minimal hull damage.

The book X-Wing: The Official Strategy Guide informs us that Darth Vader was onboard the ship while chasing Tantive IV. It's possible that the game authors were ignorant of the canon and Immortal was a mistaken made-up name for the canonical ship Devastator that appeared in the movie.